Bently Nevada TK83 Balance Master 2 User manual
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SM
View
Instra
Part Number 82231-01
Revision B, 1991
TK83 Balance Master 2
Manual
B
ENTLV
Nevada
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Table
of
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . 1
Features
•.•................•.....•....•.•...
1
Accessories . . . . • . . . . . . . . . . . . . . . . . • . . . . • . . • . . 2
OrderingInformation . . . . . . • . . . • . . . • • . . . . . . . . • . . . 4
Top View
...................................
5
Controls
..........................•........
6
Setup
...............................••.•..
7
Select
..........................•..........
8
Direct/Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
lX
or
2X
Amplitude
and
Phase . . . . . . . . . . . . . . . . . . . . . . 9
Hold.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
OperatingSummary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Theory
of
Operation
.............................
14
Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Copyright © 1988, 1991 Bently Nevada Corporation
All
Rights
Resened
Keyphasor® is a RegisteredTrademark
of
BentlyNevada Corporation
Proximitor® is a RegisteredTrademark
of
BentlyNevada Corporation
No
part
of
this publication may
be
reproduced, transmitted, stored ina retrieval system,
nor
translated intoany human
or
computer language, inanyform
or
by
anymeans, elec-
tronic, mechanical, magnetic, optical, chemical, manual,
or
otherwise, witliout
the
prior
writtenpermission
of
the copyright owner.
Copyright infringement is a serious matter underUnited States
of
America andForeign Copyright
Laws.
For
information regarding ordering, application,
or
service, call:
BentlyNevada Corporation
P.O. Box157
Minden, Nevada89423
USA
Tolephone 702-782-3611
Toll Free800-227-5514
Tolex 1561105
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11
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Introduction
RNING
Features
1
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•
TK83 HAND HELD
BALANCE MASTER2
Accessories
Field Balancing Package
PIN
82997-01
• TK83 Balance Master 2
• TK84 Optical Interface Package
• TK85 Dual Proximitor Package
• Velocity Package
• Transport Case
•
TK
Clipboard
• Manuals
2
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i
________________
BENTLY~
NEVADA'-.)
TK84 Optical Interface Package PIN 82608-01
0
• TK84 OpticalInterface • Keyphasor Mounting Kit
• OpticalTransducer • Manual
TK85
Dual
Proximity Package PIN 82609-01
• TK85
Dual
Prox:i.mitor • Probe Extension Cables
• EddyCurrent Probes • Manual
3
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TK83 HAND HELD
. BALANCE MASTER2
TKVelocity Package
PIN
82611-01
• Velocity
Seismoprobe
•
Magnetic
Base
•
Cable
•
Manual
Ordering Information
TK83 Balance Master2 82320-01
Includes:
Component
TK83
Carrying
Case
Nine
Volt
Alkaline
Battery
User
Guide
Part Number
82218-01
04160101
01810700
82231-01
4
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________________
BENTLY~
NEVADA'-.)
KEYPHASOR
INPUT
FREEZE
DISPLAY
MEASURE
OVERALL
AMPLITUDE
AND
GAP
VOLTAGE
POWER
ON/OFF
TOPVIEW
BNC
COAXIAL
CONNECTORS
SIGNAL
INPUT
/
DISPLACEMENT
4.2
mil pp
SIGNAL
134
degrees
lag
1800
rpm
lx
~
BENTLY(\
NEVADA
v
E]
TK83
BALANCE
IIASTER"
2
MEASURE
1X
PHASE
AND
AMPLITUDE
5
FOUR
LINE
LIQUID
CRYSTAL
DISPLAY
SET
KEYPHASOR
_
TRIGGER
LEVEL,
SCALE
FACTORS
AND
UNITS
MEASURE
2X
PHASE
AND
AMPLITUDE
TRANSDUCER
SELECT
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TK83 HAND HELD
BALANCE MASTER2
CONTROLS
ON/OFF
SELF
TEST
MESSAGE
BATTERY
VOLTAGE
BARGRAPH
TURNING
POWER
ON
INITIATES
A 5
SECOND
SELF-TEST
AND
CAUSES
BATTERY
VOLTAGE
TO
BE
DISPLAYED. TK83
THEN
RETURNS
TO
THE
SETUP
SAVED
AT
POWER
OFF.
POWER
ON/OFF
SAVING
MESSAGE
TURNING
POWER
OFF
CAUSES
THE
SETUP
AND
DATA
TO
BE
SAVED. TK83
WILL
RETURN
TO
THIS
SETUP
WHEN
POWERED
ON.
6
KEY§
BEGIN
SELF
TEST
BATTERY
VOLTAGE
5 7 9
Iii
WARNINQ
SAVING SETUP
3.2
mil
pp
26
degrees
log
&
WARNING
SIGNAL
SIGNAL
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________________
BENTLY~
NEVADA'-.)
KEY
ff
[£]
E]
SETUP
SIGNAL
SETUP SELECTION
PRESS AND HOLD ARROW KEYS
TO
INCREASE
OR
DECREASE
VALUE.
REPEATED PRESSING
OF
SETUP KEY SELECTS BETWEEN
KEYPHASOR THRESHOLD,
TRANSDUCER SCALE FACTORS
OR
UNITS SETUP MENUS.
SELECTION
RANGE
IS
SHOWN
BELOW
FOR
EACH MENU.
BENTLY("\
NEVADA
v
TK83
BALANCE
IIASml"
2
PRESS ANY FUNCTION KEY
TO
EXIT SETUP
SETUP
MENU
K0 THRESHHOLD 50%
I-DEC
INC-!
SETUP
MENU
DIS
SCALE
f
ACTOR
200
mV/mil
I-DEC
INC-!
SETUP
MENU
VEL
SCALE
FACTOR
500
mV/in/s
I-DEC
INC-!
SETUP
MENU
ACC
SCALE
FACTOR
100
mV/g
I-DEC
INC-t
SETUP
MENU
ENG/MET
OPTION
ENGLISH
SELECTED
It -
TOGGLE
KEYPHASOR SELECTIONS
ARE
25,
50
OR
75%
POINT
OF
THE
KEYPHASOR SIGNAL. (SEE
THE
KEYPHASOR SIGNAL PROCESSING
IN
THEORY
OF
OPERATION.)
DISPLACEMENT SCALE FACTOR RANGES
ARE
FROM
5
mV/mil
TO
9999
mV/mil
(0.2
mV
/um
to
393.7
mV
/um).
VELOCITY SCALE FACTOR RANGES
ARE
FROM
5
mV
/in/s
TO
9999
mV
/in/s.
(0.2
mV/mm/s
to
393.7
mV/mm/s).
ACCELERATION SCALE FACTOR RANGES
ARE
FROM
5
mV/g
TO
9999
mV/g.
EITHER
ARROW
WILL
TOGGLE
BETWEEN ENGLISH
OR
METRIC
SCALE FACTORS.
7
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TK83
HAND HELD
BALANCE
MASTER
2
SELECT
KEY-0'
SIGNAL
TRANSDUCER
TYPE
FILTER
MODE
&
WARNING
r
'I
~El~
B
~fl!]~
PRESS
SELECT
KEY
TO
CHANGE
TRANSDUCER
SELECTION
BETWEEN
DISPLACEMENT,
ACCELERATION,
INTEGRATED
ACCELARATION,
VELOCITY,
OR
INTEGRATED
VELOCITY.
~
~~~I/iXC)
TK83
BAU.:£
lllSTEi"
2
DIRECT/GAP
OVERALL
AMPLITUDE
KEU
ISP
LAC
EM
ENT
GAP
VOLTS
(DISPLACEMENT
ONLY) :3.4
mil
pp
-7.95
volts
GAP
MACHINE
SPEED--++--il--3600
r m
DIRECT
PRESS
DIRECT/GAP
KEY
TO
MEASURE
UNFILTERED
(DIRECT)
MAGINITUDE.
GAP
VOLTAGE
IS
DISPLAYED
ONLY
FOR
DISPLACEMENT
TRANSDUCERS.
PRESSING
KEY
SHOWS
SCALE
FACTOR
AND
UNITS.
KEYPHASOR
IS
NOT
NECESSARY
TO
MAKE
DIRECT
MEASUREMENTS.
8
,t
WARNING
IIEI
1~1
[;J
611
~
lwc1l
~Wl~XC)
TKB3
BALANCE
MASTEi
2
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i
________________
BENTLY~
NEVADA'-.)
1X
OR
2X
AMPLITUDE
and
PHASE
KEU'
SIGNAL
FILTERED
AMPLITUDE
PHASE
ANGLE--~~~
MACH
IN
E
SP
EEO
--11---tt;~gggdfilbcdhdJ
PRESS
AND
RELEASE
THE
1X
OR
2X
KEY
TO
SELECT
AMPLITUDE
AND
PHASE
MEASUREMENT
OF
THE
ONCE
OR
TWICE
PER
TURN
COMPONENT
OF
VIBRATION.
SCALE
FACTOR
AND
UNITS
ARE
SHOWN
WHILE
KEY
IS
DEPRESSED.
WITH
NO
KEYPHASOR
THE
AMPLITUDE
AND
PHASE
READOUTS
ARE
BLANKED.
SIGNAL
Li\
WARNING
HOLD
THE
MESSAGE
"HOLD"
WILL
• • • .....!*'--*!.-"-----11-+t----
ALTERNATELY
FLASH
WITH
THE
1.2
mil
pp
TRANSDUCER
TYPE
WHEN
IN
THE
-8.31
volts
GAP
HOLD
MODE.
th
WARNING
PRESS
HOLD
KEY
TO
FREEZE
DISPLAY.
VALUES
REMAIN
UNTIL
HOLD
IS
PRESSED
AGAIN.
DISPLAY
VALUES
ARE
STORED
WHEN
POWER
IS
TURNED
OFF
AND
RETURN
WHEN
POWER
IS
TURNED
ON.
9
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I
TK83 HAND HELD
BALANCE MASTER2
Operation
illustrations oftypical installations using the TK83 and accessories follow:
Temporary Seismic Transducer and Optical Keyphasor
A TK84 will power a temporaryoptical Keyphasor transducer. Use a case
mounted transducer to measure vibration.
VE
LOCI
TY
CABLE
I
TK84
MACHINE OPTICAL SENSOR
Existing Proximity Probes Only
Use a TK85 Dual Proximitor with existing eddy current probes to com-
plete the signal and Keyphasor transducer system.
EXISTING KEYPHASOR
TRANSDUCER PROBE LEAD
·~~
MACHINE
EXISTING SIGNAL
TRANSDUCER
TK85
10
SIGNAL
COAXIAL
CABLE
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________________
BENTLY~
NEVADA'-.)
Existing Proximity Probes and Proximitors Only
Use a TK84 Optical System for powering a signal Proximitor and a tem-
porary optical Keyphasor transducer.
If
you use a probe and Proximitor as
a Keyphasor transducer, you may use the TK84 to supply Proximitor
power.
MAGNETIC
EXISTING SIGNAL
ASE
TRANSDUCER PTICAL MOUNT KIT
I
MACHINE
EXISTING
PROXl~11TOR
KEYPHASOR
COAXIAL
CABLE
Existing Monitoring System with
No
Keyphasor System
If the monitor does not have a Keyphasor system, install a temporary
Keyphasor transducer (such
as
the TK84 Optical System) and connect to
the TK83. Take the signal directly from the monitor.
MAGNETIC
BASE~
MACHINE
TEMPORARY
OPTICAL
TARGET
i
OPTICAL
MOUNTING
KIT
11
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TK83HAND HELD
BALANCE
MASTER
2
Existing Monitoring System with Keyphasor System
Connect Keyphasor system and vibration signals directly
to
the TK83 if
they are available
at
a monitor front panel.
/
KEYPHASOR COAXIAL
CABLE
12
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.>,
i
________________
BENTLY~
NEVADA'-.)
OPERA
TUNG
CD
CONNECT
KEYPHASOR
0
CONNECT
TRANSDUCER
/
G)
MEASURE
AND
RECORD
DIRECT
AMPLITUDE (AND
GAP).
G)
MEASURE
AND
RECORD
1X
AMPLITUDE
AND
PHASE.
KEY§
SIGNAL
Lis
WARNING
~
El
TK83
BAI.ANCI:
MASTER
2
0
SET
TRIGGER
LEVEL.
SET
TRANSDUCER
SCALE
FACTOR.
fA\
SELECT
V
TRANSDUCER
TYPE
0
USE
ACCEPTABLE
READINGS
TO
DETERMINE
THE
BALANCE
SOLUTION.
NOTES
1. UNSTABLE
SPEED
OR
AMPLITUDE
READINGS
CANNOT
BE
RELIED
ON.
WAIT
FOR
STABLE
READING.
2.
THE
KEYPHASOR
TRIGGER
LEVEL
IS
ADJUSTED
WHEN
THE
DIRECT/GAP, 1X
OR
2X
KEYS
ARE
PRESSED,
OR
A
KEYPHASOR
ERROR
IS
DETECTED.
REPEATED
OCCURRENCE
OF
ERRORS
SUGGESTS
A
NOISY
KEYPHASOR
OR
NOT
ENOUGH
AMPLITUDE.
ATTEMPT
SETTING
THE
KEYPHASOR
THRESHOLD
USING
THE
SETUP
KEY
TO
STABILIZE
THE
KEYPHASOR.
3.
DATA
VALUES
MAY
BE
RETAINED
BY
PLACING
THE
TK83
IN
THE
HOLD
MODE.
VALUES
WILL
BE
RETAINED
WHEN
POWER
IS
TURNED
OFF.
13
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•
TK83 HAND HELD
BALANCE
MASTER
2
Theory
Of
Operation
The
TK.83
measures machine speed, overall vibration amplitude, gap volt-
age, and the one times
(lX)
and two times (2X) rotative speed amplitude
and phase components.
Keyphasor Signal Processing
The
TK83 computes speed from the time period between successive
Keyphasor pulses. Thereference point for this periodis on the falling edge
of the Keyphasor waveform. The reference is user-set at
25,
50
or 75% of
the peak to peak amplitude. The instrument also uses the reference point
as
the zero-degree reference for phase measurements of the
lX
or 2X
vibration components.
The internally-set reference voltage corresponds to
25,
50,
or 75% of the
waveform.
The
instrument compares the referencevoltage totheincoming
Keyphasor signal voltage. When the Keyphasor voltage falls below the
reference voltage, the TK83 computes the speed and notes the start of
another period.
The instrument calculates the reference voltage from the peak to peak
magnitude oftheKeyphasor signal. Itmakes this calculationwhen theuser
presses the
DIRE
CT
/GAP,
1
X,
or 2X key, or when the instrument senses a
Keyphasor error. A Keyphasor error occurs when successive Keyphasor
periods differ by more than 12 1/2%.
REFERENCE
SPEED=_1
__
PERIOD
KEYPHASOR
SIGNAL
14
PEAK
TO
PEAK
-25%
-50%
-75%
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BENTLY~
-----------------NEVADA\.)
To
calculate
the
reference
voltage,
the
instrument first samples
the
Keyphasor signal voltage for one second
at
a very high rate.
The
highest
and lowest values sampled determine
the
peak
to
peak
magnitude.
The
TK83 then determines the voltage that corresponds
to
the
25, 50,
or
75%
user-set reference point,
and
sets the voltage internally.
To
ensure reliable measurements, the Keyphasor voltage must
be
at
least
1volt
peak
to
peak,
and
have a pulse width
of
at
least 50
µ,sec
or
1%
of
the
Keyphasor period.
Vibration Signal Voltage Range
The vibration input voltage range is
+20
to
-20 volts.
The
combined gap
and vibration signals cannot exceed this value or
an
OVERRANGE
mes-
sage will appear. A displacement transducer with -14
gap
volts
can
only
have -6 volts
of
peak
vibration before
the
OVERRANGE
message. A
transducer with
no
de
voltage can have 20 volts
peak
vibration
before
the
OVER
RANGE
indication.
The
scalefactor is only
used
to
compute
the
dis-
play value. Changing the scale factor will not affect
the
overrange input.
w
<.')
<(
~
0
>
I-
+20
~
0
z
z
0
I-
<(
Q'.
(D
>
-14
-20
20
(40
~~-
-~
-
+OVERRANGE LIMIT
OV
GAP
r
VOLTS PEAK
MAXIMUM
VOLTS PEAK
TO
PEAK)
-14V
GAP
l
-6
VOLTS PEAK
MAXIMUM
(12
VOLTS
PEAK
TO
PEAK)
-OVERRANGE
LIMIT
15
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TK83 HAND HELD
BALANCE
MASTER
2
Direct/Gap Signal Processing
When you press the DIRECT GAP key, the TK83 measures the overall
vibration magnitude and gap voltage.
To
make this measurement, it
samples thevibration signal at averyhigh rate. This ensures thatit samples
voltages
at
the highest and lowest points. The difference between the
highest and lowest values
is
the overall (peak to peak) magnitude.
The instrument expresses acceleration
or
velocity measurements
as
zero
to peak (pk), and computes them as one-halfthe peak to peakvalue (pp).
It computes the gap voltage as the average of all the samples. Since gap
voltage is onlysignificant for eddy current displacement probes, the instru-
ment displays it only when you select displacement.
Whenyou selectvelocity or acceleration, an electronicintegrator switches
into the signal path. The instrument measures overall vibration after it in-
tegrates the signal.
PEAK
TO
P~AK
I•
VIBRATION
(mils).1
Oi-+---.------,--'-r--.----,c-----,--~~G_A_P,.('-m~ils)
I I I
_8
I I I
I
I
I
MECHANI
AL
GAP/~
SHAFT\u
VOLTS~------------------~
The displayed vibration value is computed from the sampled signal and
the transducer scale factor. Scale factor is the ratio
of
vibration amplitude
to thecorrespondingvoltage output
of
thetransducer. Scalefactors for the
three transducer types (displacement, velocity, and acceleration) are set
separately
and
are maintainedin memory. English unit scale factors are in
memory; metric units are computed from them.
16
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Table of contents
